CN115118828A - Image reading apparatus and image processing method - Google Patents
Image reading apparatus and image processing method Download PDFInfo
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- CN115118828A CN115118828A CN202210243173.0A CN202210243173A CN115118828A CN 115118828 A CN115118828 A CN 115118828A CN 202210243173 A CN202210243173 A CN 202210243173A CN 115118828 A CN115118828 A CN 115118828A
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- 238000003672 processing method Methods 0.000 title claims abstract description 11
- 238000000034 method Methods 0.000 claims description 48
- 230000007246 mechanism Effects 0.000 claims description 25
- 230000008878 coupling Effects 0.000 claims description 20
- 238000010168 coupling process Methods 0.000 claims description 20
- 238000005859 coupling reaction Methods 0.000 claims description 20
- 238000009795 derivation Methods 0.000 claims description 4
- 239000011521 glass Substances 0.000 description 14
- 238000010586 diagram Methods 0.000 description 6
- 238000006073 displacement reaction Methods 0.000 description 6
- 238000001514 detection method Methods 0.000 description 5
- 238000004590 computer program Methods 0.000 description 4
- 238000003708 edge detection Methods 0.000 description 3
- 230000010365 information processing Effects 0.000 description 3
- 238000004891 communication Methods 0.000 description 2
- 230000000295 complement effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000004973 liquid crystal related substance Substances 0.000 description 1
- 229910044991 metal oxide Inorganic materials 0.000 description 1
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N1/00—Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof
- H04N1/00567—Handling of original or reproduction media, e.g. cutting, separating, stacking
- H04N1/0057—Conveying sheets before or after scanning
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N1/00—Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof
- H04N1/00681—Detecting the presence, position or size of a sheet or correcting its position before scanning
- H04N1/00684—Object of the detection
- H04N1/00718—Skew
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N1/00—Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof
- H04N1/00795—Reading arrangements
- H04N1/00798—Circuits or arrangements for the control thereof, e.g. using a programmed control device or according to a measured quantity
- H04N1/00819—Self-calibrating reading means
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N1/00—Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof
- H04N1/04—Scanning arrangements, i.e. arrangements for the displacement of active reading or reproducing elements relative to the original or reproducing medium, or vice versa
- H04N1/10—Scanning arrangements, i.e. arrangements for the displacement of active reading or reproducing elements relative to the original or reproducing medium, or vice versa using flat picture-bearing surfaces
- H04N1/1061—Details relating to flat picture-bearing surfaces, e.g. transparent platen
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N1/00—Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof
- H04N1/04—Scanning arrangements, i.e. arrangements for the displacement of active reading or reproducing elements relative to the original or reproducing medium, or vice versa
- H04N1/12—Scanning arrangements, i.e. arrangements for the displacement of active reading or reproducing elements relative to the original or reproducing medium, or vice versa using the sheet-feed movement or the medium-advance or the drum-rotation movement as the slow scanning component, e.g. arrangements for the main-scanning
- H04N1/121—Feeding arrangements
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N1/00—Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof
- H04N1/23—Reproducing arrangements
- H04N1/2307—Circuits or arrangements for the control thereof, e.g. using a programmed control device, according to a measured quantity
- H04N1/2346—Circuits or arrangements for the control thereof, e.g. using a programmed control device, according to a measured quantity according to a detected condition or state of the reproducing device, e.g. temperature or ink quantity
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- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Facsimile Scanning Arrangements (AREA)
- Facsimiles In General (AREA)
- Exposure Or Original Feeding In Electrophotography (AREA)
- Image Input (AREA)
Abstract
The invention provides an image reading apparatus and an image processing method, and aims to facilitate adjustment of the inclination of a cover part relative to a main body part in the image reading apparatus. The first image reading unit is disposed on the main body. The conveying device is arranged on the cover part. The second image reading section is disposed on the cover section. The inclination deriving unit derives two document inclination angles corresponding to the first image reading unit and the second image reading unit by image processing on two read images obtained by the first image reading unit and the second image reading unit, respectively. The information output unit outputs inclination correction information corresponding to a difference between the inclination angles of the two documents by the information output device.
Description
Technical Field
The present invention relates to an image reading apparatus and an image processing method that facilitate adjustment of the inclination of a lid portion with respect to a main body portion.
Background
An image reading apparatus may include a document feeding device and an image reading portion that reads an image from a document fed by the document feeding device. Usually, the image reading unit is disposed in the main body. The document feeding device is mounted on a lid portion that can open and close the upper surface of the main body portion.
The lid may be attached to the body in a state of being inclined from an original orientation. In this case, the read image obtained by the image reading unit in the main body portion is in an original image deformed state.
Therefore, it is important that the lid is attached to the body in the original orientation.
For example, it is known that the image reading unit of the main body unit performs image reading processing on a portion of the cover unit to which a specific mark is applied, and the recognition unit recognizes a deviation between a position of the mark detected from the read image and a target position.
Therefore, when the image of the mark marked on a part of the lid portion is read by the image reading portion of the main body portion, the inclination of the lid portion with respect to the main body portion can be derived from the deviation between the position of the mark in the read image and the target position.
However, if the correcting member with the mark is not attached to the cover at the correct position in the correct orientation, the inclination of the cover cannot be accurately derived.
Further, it is difficult to determine whether or not the correction member is mounted at a correct position in a correct orientation with respect to the cover portion.
Disclosure of Invention
An object of the present invention is to provide an image reading apparatus and an image processing method that facilitate adjustment of the inclination of a cover portion to a main body portion in which an image reading portion is disposed when the cover portion incorporating a document conveying apparatus is attached to the main body portion.
An image reading apparatus according to an aspect of the present invention includes a main body, a first image reading unit, a cover, a conveying device, a second image reading unit, an inclination deriving unit, and an information output unit. The first image reading unit is disposed in the main body, and reads an image from an original document passing through a reading position on an upper surface of the main body. The lid portion is coupled to the main body portion and supported to be openable and closable on an upper surface of the main body portion. The conveying device is disposed on the cover portion, and conveys the original document along a conveying path passing through the reading position. The second image reading unit is disposed on the cover unit, and reads an image from an original document conveyed along the conveyance path. The inclination deriving unit performs an inclination deriving process of deriving two document inclination angles corresponding to the first image reading unit and the second image reading unit by image processing on the two read images obtained by the first image reading unit and the second image reading unit, respectively. The information output unit outputs inclination correction information corresponding to a difference between the inclination angles of the two documents by an information output device.
An image processing method according to another aspect of the present invention is a method of processing a read image obtained by an image reading apparatus including the main body portion, the first image reading portion, the cover portion, the conveying device, and the second image reading portion. The image processing method includes executing a tilt deriving process in which two document tilt angles corresponding to the first image reading unit and the second image reading unit are derived by image processing for two read images obtained by the first image reading unit and the second image reading unit, respectively. And the image processing method includes outputting, by the information output device, inclination correction information corresponding to a difference in the inclination angles of the two originals.
According to the present invention, it is possible to provide an image reading apparatus and an image processing method which facilitate adjustment of the inclination of a cover portion to a main body portion in which an image reading portion is arranged in a case where the cover portion incorporating a document feeding device is attached to the main body portion.
The present specification will be described with reference to the accompanying drawings as appropriate, in order to simplify the summary of the concepts described in the following detailed description. The present specification is not intended to limit the important features and essential features of the subject matter described in the claims, nor is it intended to limit the scope of the subject matter described in the claims. The object of the claims is not limited to the embodiments for solving some or all of the disadvantages described in any part of the present invention.
Drawings
Fig. 1 is a configuration diagram of an image reading apparatus according to an embodiment.
Fig. 2 is a block diagram showing a configuration of a control device in the image reading apparatus according to the embodiment.
Fig. 3 is a structural diagram of a cover coupling mechanism in the image reading apparatus according to the embodiment.
Fig. 4 is a flowchart showing an example of a procedure of the adjustment support processing in the image reading apparatus according to the embodiment.
Fig. 5 is a diagram showing an example of an upper side portion of an original detected from a read image.
Fig. 6 is a diagram showing an example of a side edge portion of a document detected from a read image.
Fig. 7 is a diagram showing an example of a line image of a calibration document detected from a read image.
Detailed Description
Embodiments of the present invention will be described below with reference to the drawings. The following embodiments are merely examples embodying the present invention, and are not intended to limit the technical scope of the present invention.
(construction of image reading apparatus 1)
The image reading apparatus 1 according to the embodiment is an apparatus capable of conveying an original 9 and reading an image of the conveyed original 9.
As shown in fig. 1, the image reading apparatus 1 includes a main body 11 and a lid 12 covering an upper surface of the main body 11. The main body 11 is a housing for housing various devices.
The lid 12 is coupled to the body 11 and supported so as to be displaceable between a closed position covering the upper surface of the body 11 and an open position opening the upper surface of the body 11. That is, the lid 12 is supported to be openable and closable on the upper surface of the main body 11.
The image reading apparatus 1 further includes a contact glass 64 and a platen glass 65 disposed on the upper surface of the main body 11. The contact glass 64 and the platen glass 65 are each a transparent plate-like member.
The image reading apparatus 1 includes the document feeding device 2, the image reading unit 6, the moving mechanism 7, the control device 8, the operation device 801, the display device 802, and the like. The document feeding device 2 is assembled to the cover 12.
The document feeder 2 includes a feed tray 3a, a discharge tray 3b, a conveyance path 40, a feeder 4, a feed document sensor 5a, a feed document sensor 5b, and the like. The supply tray 3a and the discharge tray 3b can stack originals 9, respectively.
The conveyance path 40 forms a path for conveying the original 9 in the cover portion 12. The conveyance path 40 passes from the carry-in port corresponding to the supply tray 3a to the carry-out port corresponding to the discharge tray 3b via the reading position P1 on the contact glass 64.
The supplied original document sensor 5a detects an original document 9 carried on the supply tray 3 a. For example, the document feeding sensor 5a includes a first displacement member and a first detection sensor, which are not shown.
The first displacement member receives a load of the original 9 on the feed tray 3a and displaces from an upper position, which is an initial position, to a lower position lower than the upper position. The first detection sensor detects the first displacement member displaced to the lower position.
The conveyed original sensor 5b detects the original 9 fed out from the feed tray 3a to the conveyance path 40. For example, the document feeding sensor 5b includes a second displacement member and a second detection sensor, which are not shown.
The second displacement member is displaced from the reference position to the retracted position by coming into contact with the original 9 fed from the feed tray 3a to the conveyance path 40. The second detection sensor detects the second displacement member displaced to the retreat position.
The conveying device 4 is disposed on the lid 12. The conveying device 4 feeds the originals 9 on the feed tray 3a one by one to the conveyance path 40, conveys the originals 9 along the conveyance path 40, and then discharges the originals 9 onto the discharge tray 3 b.
The conveying device 4 includes a feeding mechanism 41 corresponding to the supply tray 3a and a plurality of sets of conveying roller pairs 43 arranged along the conveying path 40.
The feeding mechanism 41 feeds the originals 9 on the feed tray 3a one by one to the conveyance path 40. In the present embodiment, the feeding mechanism 41 feeds out one original 9 at the uppermost position among the originals 9 on the feed tray 3a to the conveyance path 40.
The plurality of sets of conveying roller pairs 43 are driven to rotate by a motor not shown. Thereby, the plural sets of conveying roller pairs 43 convey the original 9 along the conveying path 40, and further discharge the original 9 from the conveying path 40 to the discharge tray 3 b.
The image reading section 6 executes image reading processing of reading an image formed on the original 9 and outputting data of the read image. The image reading portion 6 can perform the image reading process described above with respect to the original 9 conveyed along the conveying path 40. Further, the image reading section 6 can also execute the image reading process described above with respect to the original 9 carried on the platen glass 65. In the following description, an image read from the original 9 by the image reading section 6 is referred to as a read image g1 (see fig. 5 to 7).
In the present embodiment, the image reading unit 6 includes a first image reading unit 61, a second image reading unit 62, and an AFE (Analog Front End) 60.
In the following description, the upper surface of the original document 9 placed on the feed tray 3a is referred to as a first surface, and the lower surface of the original document 9 placed on the feed tray 3a is referred to as a second surface.
The first image reading unit 61 is disposed in the main body 11. The first image reading section 61 reads the image of the first side of the original 9 passing through the reading position P1 of the conveyance path 40 while being held at a position opposing the reading position P1.
The second image reading unit 62 is disposed inside the cover 12. The second image reading portion 62 reads the image of the second side of the original 9 conveyed along the conveying path 40. The second image reading portion 62 reads the image of the original 9 at a position on the upstream side in the original conveying direction of the conveyance path 40 from the reading position P1.
In the present embodiment, the first image reading unit 61 and the second image reading unit 62 include a light emitting unit 6a, a lens 6b, and an image sensor 6c (see fig. 1), respectively. The light emitting section 6a, the lens 6b, and the image sensor 6c are formed to extend in the main scanning direction.
The light emitting section 6a irradiates the original 9 with light. The lens 6b guides light reflected by the original 9 toward the image sensor 6 c. The image sensor 6c is a line sensor that detects the intensity of light reflected by the original 9 and outputs a detection signal as a signal of a read image g 1.
The AFE60 converts the signal of the read image g1 into digital image data and outputs the image data. The digital image data is data of the read image g 1.
In the example of fig. 1, the first Image reading unit 61 and the second Image reading unit 62 are each a CIS (Contact Image Sensor) in which a light emitting unit 6a, a lens 6b, and a CMOS (Complementary Metal Oxide Semiconductor) type Image Sensor 6c are integrated.
The moving mechanism 7 moves the first image reading section 61 in a range from a position facing the contact glass 64 to a position facing the platen glass 65.
When the original 9 is conveyed by the conveying device 4, the moving mechanism 7 holds the first image reading portion 61 at a position facing the contact glass 64.
On the other hand, when the original 9 is placed on the platen glass 65, the moving mechanism 7 moves the first image reading portion 61 along the platen glass 65. Thereby, the image sensor 6c of the first image reading portion 61 reads the image of the original 9 while the light of the light emitting portion 6a of the first image reading portion 61 scans the original 9 on the platen glass 65.
That is, the image reading portion 6 when the conveying device 4 is operating executes the image reading process for the original 9 conveyed along the conveyance path 40. On the other hand, the image reading section 6 when the conveying device 4 is not operating performs the image reading process for the document 9 placed on the platen glass 65.
The image sensor 6c of the first image reading unit 61 may be a CCD (Charge Coupled Device) type sensor. In this case, the moving mechanism 7 moves the light emitting unit 6a and the lens 6b, and the CCD type image sensor 6c is fixed at a predetermined position.
The operation device 801 is a device that accepts human operations, and includes, for example, operation buttons and a touch panel. The display device 802 is a device for displaying information, and includes, for example, a panel display device such as a liquid crystal display unit.
The control device 8 performs various data processing and control of the image reading device 1. As shown in fig. 2, the control device 8 includes peripheral devices such as a CPU (Central Processing Unit) 81, a RAM (Random Access Memory) 82, an auxiliary Memory device 83, and a signal interface 84. The control device 8 further includes a communication device 85 that can communicate with other devices.
The auxiliary storage device 83 is a nonvolatile storage device that can be read by a computer. The auxiliary storage device 83 can store and update computer programs and various data. For example, one or both of a flash memory and a hard disk drive are used as the auxiliary storage device 83.
The signal interface 84 converts signals output from various sensors into digital data, and transmits the converted digital data to the CPU 81. Further, the signal interface 84 converts a control instruction output from the CPU81 into a control signal, and transmits the control signal to the device to be controlled.
The CPU81 is a processor that performs various data processing and control by executing the computer programs. The RAM82 is a volatile storage device readable by a computer. The RAM82 mainly stores the computer programs executed by the CPU81 and data outputted and referred to during execution of various processes by the CPU 81.
The CPU81 contains a plurality of processing modules that are implemented by executing the computer programs. The plurality of processing modules include a main control unit 8a, a conveyance control unit 8b, a reading control unit 8c, an image processing unit 8d, and the like.
The main control unit 8a executes control for starting various processes in accordance with an operation on the operation device 801, control of the display device 802, and the like. The conveyance control unit 8b controls the conveyance of the original 9 by controlling the conveyance device 4.
The reading control section 8c controls the image reading section 6, thereby causing the image reading section 6 to execute the image reading process. The image processing section 8d performs various image processes on the read image g1 obtained by the image reading process.
The lid 12 may be attached to the body 11 in a state inclined from the original orientation. In this case, the read image g1 obtained by the first image reading unit 61 in the main body 11 is in an original image deformed state.
Therefore, it is important that the lid 12 is attached to the body 11 in the original orientation.
As shown in fig. 3, the lid 12 is connected to the body 11 by lid connection mechanisms 13 and 14 so as to be vertically rotatable. The lid coupling mechanisms 13 and 14 include a first coupling portion 13 and a second coupling portion 14.
The first connecting portion 13 includes a first base member 131 fixed to the main body portion 11 and a first hinge member 132 connected to the first base member 131. For example, the first base member 131 is fixed to the main body portion 11 by screwing or the like.
One of the pair of plate portions constituting the first hinge member 132 is connected to the first base member 131, and the other is connected to the lid portion 12. For example, the first hinge member 132 is fixed to the lid 12 by a screw or the like.
The first coupling portion 13 further includes a rotation coupling mechanism 133. The rotation coupling mechanism 133 couples the first hinge member 132 to the first base member 131 so as to be rotatable along the upper surface of the main body 11. The first hinge member 132 is rotatable about the coupling shaft 133a with respect to the first base member 131.
Therefore, the first coupling portion 13 couples the lid portion 12 to the main body portion 11 so as to be vertically rotatable and rotatable along the upper surface of the main body portion 11 about the coupling shaft 133 a.
For example, the coupling shaft 133a is disposed on an extension line of the contact glass 64 in the longitudinal direction with respect to the reading position P1.
The second coupling portion 14 includes a second base member 141 fixed to the body portion 11 and a second hinge member 142 coupled to the second base member 141. For example, the second base member 141 is fixed to the main body portion 11 by screw fixing or the like.
One of the pair of plate portions constituting the second hinge member 142 is connected to the second base member 141, and the other is connected to the lid portion 12. For example, the second hinge member 142 is connected to the lid 12 by being fixed by screws or the like.
The second coupling portion 14 further includes a movable coupling mechanism 143. The movable coupling mechanism 143 couples the second hinge member 142 to the second base member 141 so as to be displaceable along an arc.
The second hinge member 142 is displaceable along an arc centered on the connecting shaft 133 a. The second hinge member 142 is fixed to the second base member 141 by a fixing member 144 such as a screw.
The angle of the lid 12 with respect to the body 11 is adjusted by releasing the fixing member 144 and adjusting the position of the second hinge member 142 with respect to the second base member 141. The angle of the lid 12 to be adjusted is an angle with the connecting shaft 133a as the rotation center.
In the present embodiment, the rotation coupling mechanism 133 and the movable coupling mechanism 143 are an example of the inclination adjusting mechanism in the lid coupling mechanisms 13 and 14 that couple the main body portion 11 and the lid portion 12.
The second base member 141 has a plurality of scales 145 marked thereon, the plurality of scales 145 indicating the position of the second hinge member 142 relative to the second base member 141. The plurality of scales 145 each indicate an adjustment amount in the inclination adjustment mechanism. The plurality of scales 145 quantify the amount of adjustment in the inclination adjustment mechanism.
Therefore, when the image of the mark marked on a part of the lid 12 is read by the first image reading unit 61 of the main body 11, the inclination of the lid 12 with respect to the main body 11 can be derived from the deviation between the position of the mark and the target position in the read image g 1.
However, if the correction member such as the plate marked with the mark is not attached to the cover 12 at the correct position in the correct orientation, the inclination of the cover 12 cannot be derived accurately.
Further, it is difficult to determine whether or not the correcting member is mounted at the correct position in the correct orientation with respect to the cover 12.
In the image reading apparatus 1, the CPU81 executes adjustment support processing (see fig. 4) described later. The adjustment assisting process is a process for facilitating the adjustment of the inclination of the lid 12 with respect to the body 11 when the lid 12 is attached to the body 11.
The main control portion 8a starts the adjustment assisting process when detecting a predetermined adjustment start operation for the operation device 801.
(adjustment assistance processing)
An example of the procedure of the adjustment support processing will be described below with reference to a flowchart shown in fig. 4. The adjustment support processing is one embodiment of an image processing method for processing the read image g1 obtained by the image reading apparatus 1.
In the following description, S1, S2, and S … … denote identifiers of a plurality of steps in the adjustment support process. In the adjustment support process, the process of step S1 is first executed.
(Process S1)
In step S1, the main control portion 8a executes document preparation guide processing for causing the display device 802 to display predetermined guide information. Subsequently, the main control section 8a shifts the process to step S2.
The guide information is information for guiding a case where a predetermined original 9 is loaded on the feed tray 3 a. For example, the guide information is information for guiding a case where an arbitrary original 9 of a predetermined size is loaded on the feed tray 3 a.
The guide information may be information for guiding a case where a predetermined calibration original 9A is placed on the feed tray 3a (see fig. 7). The correction original 9A is an original 9 on both sides of which a predetermined line image is formed.
For example, one of a horizontal line image g13 extending in the lateral direction of the correction document 9A and a vertical line image g14 extending in the longitudinal direction of the correction document 9A is formed on both sides of the correction document 9A.
(Process S2)
In step S2, when the main control portion 8a detects a reading start operation for the operation device 801 in a state where the original 9 on the feed tray 3a is detected by the feed original sensor 5a, the process proceeds to step S3.
In a state where the original document 9 on the feed tray 3a is detected by the feed original document sensor 5a, the main control portion 8a waits until the reading start operation is detected.
(Process S3)
In step S3, the conveyance controller 8b causes the conveyance device 4 to start conveyance of the original 9, and then the process proceeds to step S4.
(Process S4)
In step S4, the reading control unit 8c causes the image reading unit 6 to execute the image reading process. Subsequently, the read control unit 8c shifts the process to step S5.
In the process of step S4, the image reading process of the second surface of the original 9 by the second image reading portion 62 and the image reading process of the first surface of the original 9 by the first image reading portion 61 are executed. As a result, two read images g1 corresponding to both sides of the original 9 are obtained.
(Process S5)
In step S5, the image processing unit 8d executes the inclination deriving process. Subsequently, the image processing unit 8d proceeds to step S6. The image processing unit 8d that executes the processing of step S5 is an example of the inclination deriving unit.
The inclination derivation process is a process of: by the image processing for each of the two read images g1 obtained in step S4, two document tilt angles θ 1 (see fig. 5 and 6) corresponding to the first image reading unit 61 and the second image reading unit 62 are derived.
For example, in step S5, the image processing section 8d detects a side portion such as the upper edge portion g11 or the side edge portion g12 of the rectangular original 9 from the read image g1 (see fig. 5 and 6).
Specifically, the image processing section 8D can detect the upper edge portion g11 of the original 9 by performing a well-known edge detection process on the read image g1 in the longitudinal direction D2. Further, the image processing section 8D can detect the side edge portion g12 of the original 9 by performing the edge detection process on the read image g1 in the lateral direction D1.
Then, the image processing section 8d derives the inclination angle of the side portion with respect to a predetermined reference direction as a document inclination angle θ 1 (see fig. 5 and 6).
Further, in the case where the read image g1 is an image read from the correction original 9A, the image processing section 8d may detect the horizontal line image g13 or the vertical line image g14 by the edge detection processing.
Further, in the case where the horizontal line image g13 or the vertical line image g14 is a predetermined color image such as red, green, or blue, the image processing section 8d can detect the horizontal line image g13 or the vertical line image g14 (refer to fig. 7) by detecting an image of a specific color from the read image g 1.
The image processing unit 8d may derive the inclination angle of the horizontal line image g13 or the vertical line image g14 with respect to a predetermined reference direction as the document inclination angle θ 1 (see fig. 7).
Normally, the orientation of the original 9 is almost unchanged in the middle of the conveyance of the original 9 from the position of the second image reading portion 62 to the reading position P1.
Therefore, the difference between the two document inclination angles θ 1 derived in step S5 represents the angle formed between the longitudinal direction of the first image reading unit 61 and the longitudinal direction of the second image reading unit 62. The angle formed between the longitudinal direction of the first image reading unit 61 and the longitudinal direction of the second image reading unit 62 indicates the inclination of the lid 12 with respect to the body 11.
For convenience of understanding, fig. 5 to 7 show examples in which the document inclination angle θ 1 is not 0 °. However, when the inclination adjustment of the cover portion 12 is performed, the document inclination angle θ 1 corresponding to at least the read image g1 obtained by the second image reading portion 62 is usually substantially 0 °.
When the document inclination angle θ 1 derived from the read image g1 obtained by the second image reading unit 62 is out of the predetermined allowable range, the image processing unit 8d may shift the process to step S1. Thus, the processing in steps S1 to S4 is repeated until the original 9 is conveyed in the correct direction without being tilted.
When the processing in steps S1 to S4 is repeated a predetermined number of times, the main controller 8a may cause the display device 802 to display the lid internal adjustment information. The inside-cover adjustment information is information for urging an adjuster to adjust the attachment state of the document feeding device 2 and the second image reading section 62 to the cover 12.
(Process S6)
In step S6, the main control portion 8a outputs inclination correction information corresponding to the difference between the two original tilt angles θ 1 derived in step S5, via the display device 802. Subsequently, the main control section 8a ends the adjustment assisting process.
The main control unit 8a that executes the processing of step S6 is an example of an information output unit. The display device 802 is an example of an information output device. The main control unit 8a may output the inclination correction information as audio by an audio output device, not shown. The audio output device is an example of an information output device.
For example, the tilt correction information is information obtained by converting the difference between the two document tilt angles θ 1 into the adjustment amount of the scale 145 in the movable coupling mechanism 143. The adjustment amount of the scale 145 is an example of the adjustment amount in the inclination adjustment mechanism.
According to the present embodiment, the inclination of the lid 12 with respect to the body 11 can be easily adjusted. Further, the correcting member marked with the mark read by the first image reading portion 61 does not have to be attached to the cover portion 12.
(application example)
The processes of step S5 and step S6 in the adjustment support process shown in fig. 4 may be executed by a processor of an information processing apparatus capable of communicating with the image reading apparatus 1. In this case, the CPU81 transmits the data of the two read images g1 obtained in step S4 to the information processing apparatus via the communication apparatus 85.
On the other hand, the processor of the information processing apparatus receives data of two read images g1 from the image reading apparatus 1, and further performs the processes of step S5 and step S6. The same effects as those in the case of the above-described embodiment can be obtained also in the case of this application example.
The scope of the present invention is not limited to the above description, but is defined by the claims, and therefore, the embodiments described in the present specification are to be considered as illustrative and not restrictive. Therefore, all changes that do not depart from the scope and boundary of the claims and that are equivalent to the scope and boundary of the claims are intended to be embraced therein.
Claims (5)
1. An image reading apparatus, characterized by comprising:
a main body portion;
a first image reading unit that is disposed in the main body and reads an image from an original document passing through a reading position on an upper surface of the main body;
a lid portion coupled to the main body portion and supported to be openable and closable on an upper surface of the main body portion;
a conveying device disposed on the cover portion and conveying the original document along a conveying path passing through the reading position;
a second image reading unit disposed on the cover unit, for reading an image from the document transported along the transport path;
a skew deriving unit that performs a skew deriving process of deriving two document skew angles corresponding to the first image reading unit and the second image reading unit by using image processing for the two read images obtained by the first image reading unit and the second image reading unit, respectively; and
and an information output unit for outputting inclination correction information corresponding to a difference between the two original inclination angles by the information output device.
2. The image reading apparatus according to claim 1, wherein the tilt correction information includes information for converting a difference between the tilt angles of the two documents into an adjustment amount of a tilt adjustment mechanism in a cover coupling mechanism that couples the main body portion and the cover portion.
3. The image reading apparatus according to claim 1 or 2,
the inclination derivation process includes:
detecting a rectangular edge portion of the original from the read image; and
the inclination angle of the side portion with respect to a predetermined reference direction is derived as the original inclination angle.
4. The image reading apparatus according to claim 1 or 2,
the inclination derivation process includes:
detecting a predetermined line image included in the read image; and
deriving an inclination angle of the line image with respect to a predetermined reference direction as the original inclination angle.
5. An image reading method of processing a read image obtained by an image reading apparatus, the image reading apparatus comprising:
a main body portion;
a first image reading unit that is disposed in the main body and reads an image from an original document passing through a reading position on an upper surface of the main body;
a lid portion coupled to the main body portion and supported to be openable and closable on an upper surface of the main body portion;
a conveying device disposed on the cover portion and conveying the original document along a conveying path passing through the reading position; and
a second image reading section disposed on the cover section and reading an image from the document transported along the transport path,
the image processing method is characterized by comprising:
executing inclination derivation processing for deriving two document inclination angles corresponding to the first image reading unit and the second image reading unit by image processing for the two read images obtained by the first image reading unit and the second image reading unit, respectively; and
and outputting inclination correction information corresponding to the difference between the two original inclination angles through an information output device.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2021044028A JP2022143494A (en) | 2021-03-17 | 2021-03-17 | Image reading device and image processing method |
| JP2021-044028 | 2021-03-17 |
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| CN115118828A true CN115118828A (en) | 2022-09-27 |
| CN115118828B CN115118828B (en) | 2024-03-08 |
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| CN202210243173.0A Active CN115118828B (en) | 2021-03-17 | 2022-03-11 | Image reading apparatus and image processing method |
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|---|---|
| US (1) | US11736638B2 (en) |
| JP (1) | JP2022143494A (en) |
| CN (1) | CN115118828B (en) |
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| JP2022178349A (en) * | 2021-05-20 | 2022-12-02 | 京セラドキュメントソリューションズ株式会社 | Image reading device, image processing method, and program |
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| JP2007306411A (en) | 2006-05-12 | 2007-11-22 | Ricoh Co Ltd | System, mechanism and method for assembling document feeder to image reader, image reader, image forming apparatus, and image forming apparatus with image reader |
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2021
- 2021-03-17 JP JP2021044028A patent/JP2022143494A/en active Pending
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2022
- 2022-03-11 CN CN202210243173.0A patent/CN115118828B/en active Active
- 2022-03-14 US US17/654,797 patent/US11736638B2/en active Active
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| JPH05176133A (en) * | 1991-12-19 | 1993-07-13 | Tokyo Electric Co Ltd | Image reader |
| JPH0690332A (en) * | 1992-09-09 | 1994-03-29 | Fuji Photo Film Co Ltd | Picture reader and its reading method |
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| JP2012253479A (en) * | 2011-06-01 | 2012-12-20 | Fuji Xerox Co Ltd | Image reading apparatus and image forming apparatus |
| US20170048410A1 (en) * | 2015-08-10 | 2017-02-16 | Canon Kabushiki Kaisha | Image reading apparatus and image reading method |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2022143494A (en) | 2022-10-03 |
| CN115118828B (en) | 2024-03-08 |
| US20220303403A1 (en) | 2022-09-22 |
| US11736638B2 (en) | 2023-08-22 |
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